Fix virtual/override/final usage in Source/core/editing/.

Source/core/editing/ReplaceNodeWithSpanCommand.h

 /*
  * Copyright (c) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 35 matching lines @@
         return adoptRefWillBeNoop(new ReplaceNodeWithSpanCommand(element));
     }
 
     HTMLSpanElement* spanElement() { return m_spanElement.get(); }
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit ReplaceNodeWithSpanCommand(PassRefPtrWillBeRawPtr<HTMLElement>);
 
-    virtual void doApply() override;
-    virtual void doUnapply() override;
+    void doApply() override;
+    void doUnapply() override;
 
     RefPtrWillBeMember<HTMLElement> m_elementToReplace;
     RefPtrWillBeMember<HTMLSpanElement> m_spanElement;
 };
 
 } // namespace blink
 
 #endif // ReplaceNodeWithSpanCommand